Parameters of cardiovascular system at the unexercised and trained examinees by methods of classical statistics and new methods of calculation of chaotic dynamics of behavior of a vector of a condition of a human body in phase space are studied. The tendency to increase in the area of quasiattractors of unexercised examinees after physical activity is shown that is also confirmed by change of values of volumes of quasiattractors after loading in comparison with data to loading. Long physical activity (training) stabilizes parameters of cardiovascular and neuromuscular systems of the trained students in aspect of natural changes of parameters of quasiattractors, and their dynamics shows fitness degree. Calculation of parameters of quasiattractors of cardiovascular system allows to estimate objectively dynamics of reserve opportunities of an organism and their predictive importance.